How To Flash A Roof Valley

Two ways to flash roof edges.

How to flash a roof valley.

Step 6 install the flashing. Make sure to cover the gap at the bottom of the raised ridge. Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. Details concrete masonry roofing wrb flashing.

Stop nailing 6 inches from the center. Now nail this first flashing at both its far ends. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles. Shingle the other side of the valley the same way.

Protect the eave from ice dams and sideways rain step one in steep slope roofing is the edge flashing. Fold the top of the flashing over the ridge. Lay the flashing down in the roof valley and start at the lower end of the roof. Attach the flashing panel in place at the bottom.

Make sure that the end of the flashing panel is perfectly in line with the edge of the roof. To splice the pieces add roofing cement to the lower piece and install the upper piece with at least a six inch. Roof one side of the valley running the shingles across it. Cut the bottom edge and fold it down over the drip edge.

Use 1 inch galvanized roofing nails.